/*
   Copyright (c) 2011, 2012 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-18 Marco Riccardi - initial implementation
 *  2012-04-06 Marco Riccardi - added message in DliParseException
 *
 */
package org.mizartools.dli;

public class Argeq extends Term {

	private int nr1 = -1;
	private int nr2 = -1;

	private Argeq(){}
	
	public Argeq(int nr1, int nr2){
		this.nr1 = nr1;
		this.nr2 = nr2;
	}
	
	public static Argeq newInstance(String string) throws DliParseException {
		Argeq argeq = new Argeq();
		if (string.equals("$argeq")){
			return argeq;
		}
		int position = string.indexOf("(");
		if (position == -1) {
			throw new DliParseException("["+string+"] is not valid in Argeq");
		}
		string = string.substring(position+1,string.length()-1);
		position = string.indexOf(",");
		if (position == -1) {
			throw new DliParseException("["+string+"] is not valid in Argeq");
		}
		try{
			argeq.nr1 = Integer.valueOf(string.substring(0, position));
		}
		catch (Exception e){
			throw new DliParseException("["+string+"] is not valid in Argeq");
		}
		try{
			argeq.nr2 = Integer.valueOf(string.substring(position+1, string.length()));
		}
		catch (Exception e){
			throw new DliParseException("["+string+"] is not valid in Argeq");
		}
		return argeq;
	}
	
	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append("$argeq");
		if (nr1 != -1){
			sb.append("(");
			sb.append(nr1);
			sb.append(",");
			sb.append(nr2);
			sb.append(")");
		}
		return sb.toString();
	}
	
}
